diff --git a/sys/kern/kern_mutex.c b/sys/kern/kern_mutex.c
index bc03a722401..f44b44e7efc 100644
--- a/sys/kern/kern_mutex.c
+++ b/sys/kern/kern_mutex.c
@@ -233,7 +233,8 @@ __mtx_lock_flags(volatile uintptr_t *c, int opts, const char *file, int line)
 
 	m = mtxlock2mtx(c);
 
-	KASSERT(kdb_active != 0 || !TD_IS_IDLETHREAD(curthread),
+	KASSERT(kdb_active != 0 || SCHEDULER_STOPPED() ||
+	    !TD_IS_IDLETHREAD(curthread),
 	    ("mtx_lock() by idle thread %p on sleep mutex %s @ %s:%d",
 	    curthread, m->lock_object.lo_name, file, line));
 	KASSERT(m->mtx_lock != MTX_DESTROYED,
@@ -390,7 +391,7 @@ _mtx_trylock_flags_(volatile uintptr_t *c, int opts, const char *file, int line)
 
 	m = mtxlock2mtx(c);
 
-	KASSERT(kdb_active != 0 || !TD_IS_IDLETHREAD(curthread),
+	KASSERT(kdb_active != 0 || !TD_IS_IDLETHREAD(td),
 	    ("mtx_trylock() by idle thread %p on sleep mutex %s @ %s:%d",
 	    curthread, m->lock_object.lo_name, file, line));
 	KASSERT(m->mtx_lock != MTX_DESTROYED,
diff --git a/sys/kern/kern_rwlock.c b/sys/kern/kern_rwlock.c
index 988a44ade67..c8b1d7ca716 100644
--- a/sys/kern/kern_rwlock.c
+++ b/sys/kern/kern_rwlock.c
@@ -269,7 +269,8 @@ _rw_wlock_cookie(volatile uintptr_t *c, const char *file, int line)
 
 	rw = rwlock2rw(c);
 
-	KASSERT(kdb_active != 0 || !TD_IS_IDLETHREAD(curthread),
+	KASSERT(kdb_active != 0 || SCHEDULER_STOPPED() ||
+	    !TD_IS_IDLETHREAD(curthread),
 	    ("rw_wlock() by idle thread %p on rwlock %s @ %s:%d",
 	    curthread, rw->lock_object.lo_name, file, line));
 	KASSERT(rw->rw_lock != RW_DESTROYED,
@@ -305,7 +306,7 @@ __rw_try_wlock(volatile uintptr_t *c, const char *file, int line)
 
 	rw = rwlock2rw(c);
 
-	KASSERT(kdb_active != 0 || !TD_IS_IDLETHREAD(curthread),
+	KASSERT(kdb_active != 0 || !TD_IS_IDLETHREAD(td),
 	    ("rw_try_wlock() by idle thread %p on rwlock %s @ %s:%d",
 	    curthread, rw->lock_object.lo_name, file, line));
 	KASSERT(rw->rw_lock != RW_DESTROYED,
@@ -615,7 +616,8 @@ __rw_rlock(volatile uintptr_t *c, const char *file, int line)
 	td = curthread;
 	rw = rwlock2rw(c);
 
-	KASSERT(kdb_active != 0 || !TD_IS_IDLETHREAD(td),
+	KASSERT(kdb_active != 0 || SCHEDULER_STOPPED_TD(td) ||
+	    !TD_IS_IDLETHREAD(td),
 	    ("rw_rlock() by idle thread %p on rwlock %s @ %s:%d",
 	    td, rw->lock_object.lo_name, file, line));
 	KASSERT(rw->rw_lock != RW_DESTROYED,
@@ -816,7 +818,6 @@ _rw_runlock_cookie(volatile uintptr_t *c, const char *file, int line)
 	TD_LOCKS_DEC(curthread);
 }
 
-
 /*
  * This function is called when we are unable to obtain a write lock on the
  * first try.  This means that at least one other thread holds either a
diff --git a/sys/kern/kern_sx.c b/sys/kern/kern_sx.c
index 84414960b58..b05a702e13a 100644
--- a/sys/kern/kern_sx.c
+++ b/sys/kern/kern_sx.c
@@ -295,7 +295,8 @@ _sx_xlock(struct sx *sx, int opts, const char *file, int line)
 	uintptr_t tid, x;
 	int error = 0;
 
-	KASSERT(kdb_active != 0 || !TD_IS_IDLETHREAD(curthread),
+	KASSERT(kdb_active != 0 || SCHEDULER_STOPPED() ||
+	    !TD_IS_IDLETHREAD(curthread),
 	    ("sx_xlock() by idle thread %p on sx %s @ %s:%d",
 	    curthread, sx->lock_object.lo_name, file, line));
 	KASSERT(sx->sx_lock != SX_LOCK_DESTROYED,
@@ -332,7 +333,7 @@ sx_try_xlock_(struct sx *sx, const char *file, int line)
 	if (SCHEDULER_STOPPED_TD(td))
 		return (1);
 
-	KASSERT(kdb_active != 0 || !TD_IS_IDLETHREAD(curthread),
+	KASSERT(kdb_active != 0 || !TD_IS_IDLETHREAD(td),
 	    ("sx_try_xlock() by idle thread %p on sx %s @ %s:%d",
 	    curthread, sx->lock_object.lo_name, file, line));
 	KASSERT(sx->sx_lock != SX_LOCK_DESTROYED,
@@ -1030,7 +1031,8 @@ _sx_slock(struct sx *sx, int opts, const char *file, int line)
 	uintptr_t x;
 	int error;
 
-	KASSERT(kdb_active != 0 || !TD_IS_IDLETHREAD(curthread),
+	KASSERT(kdb_active != 0 || SCHEDULER_STOPPED() ||
+	    !TD_IS_IDLETHREAD(curthread),
 	    ("sx_slock() by idle thread %p on sx %s @ %s:%d",
 	    curthread, sx->lock_object.lo_name, file, line));
 	KASSERT(sx->sx_lock != SX_LOCK_DESTROYED,